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Just introduce cdn directly into index.html. No need to go to such trouble.

import $ from ＇jquery＇
首先 cnpm i --save jquery

1. npm i jquery --save import $ from jquery This will put jquery into the final generated bundle

2. index.html引入，import $ from 'jquery', webpack 的配置項(xiàng)external里面加上 'jquery': 'jQuery' He will look for jquery from the overall perspective.

wabpack introduces jquery

1.npm i jquery --save (you will still depend on jquery after publishing)
2. In the entry file main.js (depending on the entry file you configured), introduce import $ from 'jquery'